纳米微粒对低温保护剂比热容的影响  

Effects of Nanoparticles on Specific Heat of Cryoprotectant Solutions

作　　者：刘连军[1] 徐海峰[1] 郝保同[1] 唐临利[1] 刘宝林[1] 

机构地区：[1]上海理工大学生物系统热科学研究所,上海200093

出　　处：《制冷学报》2012年第4期55-60,共6页Journal of Refrigeration

基　　金：国家自然科学基金(51076108)资助项目~~

摘　　要：为了研究纳米微粒对低温保护剂热力学性质的影响,实验利用差示扫描量热仪(DSC)测量了加入羟基磷灰石(HA)纳米微粒的丙三醇低温保护剂溶液(浓度为50%)比热容的值。实验结果表明:当加入HA纳米微粒质量分数为0.1%时,其溶液的比热容的值有略微的下降。但是当加入的纳米微粒质量分数提高到0.5%时,溶液的比热容的值发生了比较明显的下降。因为比热容与热扩散系数成反比,所以小的比热容能提高降温速率。针对实验中的比热容的变化,作者尝试做出了一些理论解释。To study the effects of the nanoparticles on thermodynamic parameter of cryoprotectant solutions, the specific heat of the glycerol solutions （50% v/v） with/without nanoparticiles （HA） was measured by using DSC. The results show that specific heat of the glycerol solutions has decreased slightly, when the mass fraction of nanoparticles is 0.1%. While specific heat of the glycerol solutions has decreased obviously, when the mass fraction of nanoparticles is 0.5%. Because the specific heat is inverse to the thermal diffusivity, the less the specific heat is, the farther the cooling rate is. This paper provides a theoretical explanation about it.

关 键 词：工程热物理 DSC 比热容 纳米微粒 低温保护剂 

分 类 号：TB611[一般工业技术—制冷工程]